Hi, Zeplin, roughly you are right, but the next problem will be what do you want do do with your backup tape ? Is it a security in case of system crash ? Then comes my question : how will you boot on the tape if your system physically has no tape reader ?
There is an alternate way. You already have another AIX system on your site. I would say, just try to install the second system as a NIM server. The NIM server will act as a backup server and as an install server.
Then, if you have to re-install your backup, at boot time choose "installing from network", and the system will boot in installation mode from the backup which is on the NIM install server.
And, by the way, yes, if the NIM server has a tape drive, the NIM server is able to create a tape backup from a mksysb file.
It's not such an obvious way, but having a NIM install server is rather useful, and if it avoids bying a tape for backups, it's fine.